I've had this lens for about a year. It is a great companion for my a55. This combo is light and discreet. It works out to a medium wide angle with APS-C. I carry this kit around almost all the time. I love it. It is just a bit soft wide open, but after f/4 it is just fine.
10/18/18 Update: I've now used this lens on the A77mk1 and mk2, and now on FF. I still love this lens, but I do see some significant vignetting at f/2.8.